ESTRO course Dose Modelling and Verification 2017

9

The Focal source spot

Approximately Gaussian source distributions, in some cases elliptical. Typical FWHM is 1-2 mm. (Measured using a rotated slit camera and a diode.)

FWHM

FWHM

1 mm

1 mm

Initial beam

Jaffray et al [2]

T Knöös

Warsaw 2017